Hello. I'll be grateful for some help.

1) Is the preposition "for" OK in the phrase "our hopes for a better future" or is it "of"?
2) Is the sentence OK "April 5th is my sister's birthday"?
3) Please check the sentence "I often recollect our boat trip on the Rhine to Austria."
4) Do you think it's possible to say "I'm grateful for such smiles of fortune" meaning "for such splendid opportunities"?
Thank you so much for your time and help.

All are correct. In #1, "for" is better than "of". In #3, the Rhine does not cross Austria, but the sentence is grammatically correct anyway. And, yes, the metaphor is appropriate in #4.

Hello! I'd be happy to help you with your questions. Here are the answers:

1) In the phrase "our hopes for a better future," the preposition "for" is indeed correct. We use "for" when we want to express the purpose or goal of our hopes. So, in this case, "for" shows that our hopes are directed towards achieving a better future.

2) The sentence "April 5th is my sister's birthday" is grammatically correct. It states that April 5th is the specific date on which your sister celebrates her birthday.

3) The sentence "I often recollect our boat trip on the Rhine to Austria" seems fine grammatically. However, the word "recollect" may sound a bit formal or old-fashioned. If you prefer a more common expression, you could use "remember" instead.

4) The sentence "I'm grateful for such smiles of fortune" sounds poetic or metaphorical. While the phrase "smiles of fortune" can be interpreted to mean "splendid opportunities," its meaning might not be immediately clear to everyone. It's always a good idea to consider your audience and whether they will understand the intended meaning. If you're aiming for clarity, you could rephrase the sentence as "I'm grateful for such splendid opportunities" to make the meaning more explicit.

I hope these explanations help! Let me know if you have any further questions or need more clarification.